Free Traffic Legal Advice

Does the provided image have a - sign next to the speed? If so then they've clocked you, and the - means speed away from camera.

I was driving a van last night and passed one of these new AI phone & seat belt cameras and initially thought no more of it as everything was above board, then as I got to my destination I realised that the dark clothing I was wearing may have masked my seatbelt, and now it's got me worried that the camera may have caught me, as these are relatively new, and I've not seen much about them only the pictures where it's obvious phone use or lack of seatbelt.

I'm assuming that the resolution on them is good enough that either it would detect the belt being worn, or a manual check would show that you can see the top of the belt going over my shoulder, and the bottom bits across my lap to the connector?

So were you in lane 3 but indicating left to move into lane 2 to continue straight?

If so it may be that if lane 3 was red to turn right but lanes 1 & 2 were green for straight on that you have triggered the lane 3 camera. Does that make sense?

If you look at the aerial photo there are cars parked on the bridge like you were so that could support that you weren't aware it had changed.

Having looked at streetview the only thing I could think of is that it is the approach to traffic lights, but I have always thought, and could be wrong, that it is only zig zags that would enforce an approach to lights, and common sense would kick in that you wouldn't park near a crossing/lights, but the distance here would almost certainly not be relevant here.

I'd say the officer has got it wrong, although on 2 different years on streetview there are suspension notices on the fence, but as above going to court to prove your point could end up becoming quite costly if the court find against you, and then end up with a larger fine and costs.
It may be one to speak with the local councillor about otherwise take the £30 on the chin.

Do you or anyone who was with you at the cinema have Google maps tracking your journeys on the timeline? If so that would help to show if you were in that area or what time you got home which could assist in showing that you weren't in the area if there are ANPR cameras on your route home that would corroborate this.

Just be careful in case Chief Inspector Corner of the Yard is on here monitoring this forum and reporting back.

Depending on if they were actually wanting to stop you in the first place you'd be looking at failing to stop, and potentially careless/dangerous driving offences. They'd then be looking at the actual car itself - VED, insurance, MOT etc, and you could expect a knock at the door with them wanting to have a look around to see what you may have been trying to hide by running off from them before any other potential charges may be looked at.

The only way to know what will happen next is to go and speak with them as said above.